Landscape Focus Bracketing Script - page 9 - Completed and Working Scripts - CHDK Forum
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Landscape Focus Bracketing Script

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Offline pigeonhill

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Re: Landscape Focus Bracketing Script
« Reply #80 on: 11 / April / 2019, 15:03:25 »
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Just did some testing and I think I don’t fully understand modes.


I just did a test from Av mode.


If I just switch between Av and M mode, the Av exposure looks ok and the shutter speed is ok. But if I switch from Av to M the shutter speed is too fast, ie image dark.


What I need to do is work out how to come into the script from, say, Av mode and get the right Av set shutter speed.


More thinking required I think.
« Last Edit: 11 / April / 2019, 15:07:32 by pigeonhill »
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Offline pigeonhill

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Re: Landscape Focus Bracketing Script
« Reply #81 on: 11 / April / 2019, 15:24:16 »
@c_joerg

If you have the time, maybe you can try this version and see if it fixes your problem?
https://gist.github.com/pigeonhill/3fe9e52621db7149eb3505bd60b395cb
Fingers crossed  ;)
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Offline c_joerg

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Re: Landscape Focus Bracketing Script
« Reply #82 on: 12 / April / 2019, 12:11:02 »
Quote from: pigeonhill on 11 / April / 2019, 15:24:16
If you have the time, maybe you can try this version and see if it fixes your problem?

Looks OK  :)
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Offline pigeonhill

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Re: Landscape Focus Bracketing Script
« Reply #83 on: 12 / April / 2019, 12:38:54 »
@c_joerg

 :D
Many thanks for testing.

The 'issue' was related to PowerShot deficiencies and me not fully appreciating them.

PowerShot Av mode is limited to 1s Tv, thus you should never use Av mode with a Tv reported value of 1s, as you don't know if it is 1s.

Also if you switch to M mode from Av, the Tv value isn't transferred to M mode by Canon.

Anyway, hopefully the script is now solid.

BTW I did a test shot on the way home that gives a flavour of the script's capability, although I should have focused a little closer to the camera.  Also, I used f/8 rather than the optimum aperture of f/5.6.

Once again, thanks for all your support and feedback.

Cheers

Garry
« Last Edit: 13 / April / 2019, 01:40:55 by pigeonhill »
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Offline c_joerg

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Re: Landscape Focus Bracketing Script
« Reply #84 on: 13 / April / 2019, 07:45:12 »
Quote from: pigeonhill on 12 / April / 2019, 12:38:54
BTW I did a test shot on the way home that gives a flavour of the script's capability, although I should have focused a little closer to the camera. 
Such shots can only be done in absolute calm, right?
Quote from: pigeonhill on 12 / April / 2019, 12:38:54
Also, I used f/8 rather than the optimum aperture of f/5.6.
Here is a script where you can find the optimum aperture. Most of my P&S with small Senor had there optimum already with open aperture.
https://chdk.setepontos.com/index.php?topic=13532.30


About focus bracketing strategies:
From -DelX to +DelX (around the current position) might be a good range…

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Offline pigeonhill

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Re: Landscape Focus Bracketing Script
« Reply #85 on: 13 / April / 2019, 09:15:12 »
@c_joerg

'Best' here means 'best' balance between defocus blur and diffraction blur. Plus, of course, this then needs to be balanced out with intrinsic lens quality.
Which is why F/5.6 on G7X is pretty good for 'best' quality, over all.
By the way have added in the -Del to + Del option: https://gist.github.com/pigeonhill/3fe9e52621db7149eb3505bd60b395cb
Will update CHDK words this weekend.
Cheers
Garry
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Offline c_joerg

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Re: Landscape Focus Bracketing Script
« Reply #86 on: 08 / January / 2020, 10:05:10 »
I have used the script 'Get Brackets.lua' Rev 1.5 for a long time on the G1x. All settings default, only display is on. Camera mode is M.

With AF everything is ok.

If I set the focus manually, then the script hangs. A picture is taken and then it's over. Have you ever tried that?
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M100 100a, M3 121a, G9x II (1.00c), 2*G1x (101a,100e), S110 (103a), SX50 (100c), SX230 (101a), S45,
Flickr https://www.flickr.com/photos/136329431@N06/albums
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Offline pigeonhill

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Re: Landscape Focus Bracketing Script
« Reply #87 on: 08 / January / 2020, 11:54:10 »
I’ll take a look when I can.
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Offline pigeonhill

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Re: Landscape Focus Bracketing Script
« Reply #88 on: 08 / January / 2020, 13:35:30 »
@c_joerg


Just had a quick look and all looks ok at my end.


I always set the focus manually and as I say, I can’t make the script not work.


A bit of a mystery, as the script sets itself to Manual exposure mode and manual focus mode.
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Offline c_joerg

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Re: Landscape Focus Bracketing Script
« Reply #89 on: 09 / January / 2020, 11:59:46 »
I update now to latest CHDK release.
Now the script doesn’t work anymore. Made only one shoot. Video attached.
I miss the text output from an older version. I have attached the script used.
I haven’t debug yet but maybe it waits in

Code: [Select]
hook_shoot.count() or hook_raw.count()
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M100 100a, M3 121a, G9x II (1.00c), 2*G1x (101a,100e), S110 (103a), SX50 (100c), SX230 (101a), S45,
Flickr https://www.flickr.com/photos/136329431@N06/albums
YouTube https://www.youtube.com/channel/UCrTH0tHy9OYTVDzWIvXEMlw/videos?shelf_id=0&view=0&sort=dd
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